/**
 * @Author liangzai
 * @Description:
 */
public class TreeNode {
    public int val;
    public demo1.TreeNode left;
    public demo1.TreeNode right;

    public TreeNode(int val, demo1.TreeNode left, demo1.TreeNode right) {
        this.val = val;
        this.left = left;
        this.right = right;
    }
}
